拟渐尖楼梯草 ni jian jian lou ti cao

Subshrubs, dioecious, ca. 100 cm tall. Stems erect, branched, glabrous. Leaves alternate; nanophylls absent; stipules narrowly linear-lanceolate, 8-10 × 1-1.2 mm, sparsely puberulent, without cystoliths; petiole 1.5-5 mm; leaf blade obliquely elliptic, 11-17 × 3.5-5.5 cm, papery, major basal lateral veins both arising at base of leaf blade, abaxial surface sparsely strigillose, adaxial surface sparsely hirtellous, cystolith absent; base obliquely cuneate, margin dentate, apex caudate. Male inflorescences solitary, in pairs, or 2-clustered, simple, ca. 6 mm in diam.; peduncle ca. 3 mm; receptacle ca. 2 mm in diam.; bracts connate, 2-3 mm wide; bracteoles cymbiform-linear or cymbiform-oblong. Male flowers 4-merous. Fl. Mar.

Mountain forests; 1400-1500 m. Yunnan (Gongshan) [Laos].